Electric furnace



Patented Ian. 3, I899.

R F. H T U E D A 6% 0 mm 6 n N ELECTRIC FURNACE.

(Application filed June 2, 1897.) Y

(NO Model.)

mzyonms PETERS coy, PHDTD-LITHOO WASHVNGTON, n, 1;.

No. 6I6,906. Patented Jan 3, I899. J. A. DEUTHER. ELECTRIC FURNACE.

(Application filed June 2, 1897. 3 Sheets-Sheet 2.

V L I Patented Ian. 3, I899.

J. A. DEUTHER.

ELECTRlC FURNACE.

(Application filed. June 2, 1897-1 3 SheetsSheet 3.

(No Model.)

THE Nonms vzrcns co, mom-u'mo, WASHINGYON. o. c,

UNITED STATES PATENT OFFICE.

JAMES A. DEUTIIER, OF BOSTON, MASSACHUSETTS.

ELECTRIC FURNACE.

SFECIFICATION forming part of Letters Patent No. 616,906, dated January3, 1899.

Application filed June 2, 1897. Serial NO- 639IO9G- (NO B10561) T0 atwhom zit may concern:

Be it known that I, J AMES A. DEUTHER, of Boston, in the county ofSuffolk and State of Massachusetts, have invented certain new and usefulImprovements in Electric Furnaces,of which the following is aspecification.

My invention relates to new and useful improvements in electric furnacesand is in the nature of improvements upon the furnaces described andshown in United States Letters Patent No. 575,826, dated January 26,1897, issued to me, and No. 575,829, issued to Joyce and myself January26, 1897.

The object of my invention is to render more economical the operationsof electric furnaces and by mechanical devices render more certain anduniform electric smelting processes.

In the accompanying drawings, which illustrate a construction embodyingmy invention, Figure l is a front elevation of my improved electricfurnace with the casing entirely removed in order to clearly show theconstruction and arrangement of the parts and showing four hoppers, oneof which is in section to illustrate the construction thereof. Fig. 2 isa perspective view of the mechanism for agitating and delivering the rawmaterial,consisting of carbon and lime, within the influence of the are.Fig. 3 is a sectional plan view on the line 3 3, Fig. 1, but with thesprocket-chain omitted. Fig. 4 is a longitudinal cross-sectional viewthrough the lower part of Fig. 1.

Like letters of reference refer to like parts throughout the severalviews.

In the operation of my improved automatic furnace power is transmittedfrom any suitable source by the shaft A, having the bearing A on one ofthe side beams Oof the furnace, and to said shaft A there is firmlysecured the pulley B, over which passes the driving-belt 13, alsopassing around the pulley B fast on the shaft B which has suitablebearings, one of which, 15, is secured to the side beam C. On said shaftB there is firmly secured the pulley B, and around said pulley l3" andalso around another pulley B there is located a drivingbelt B The pulleyB is fast on the shaft 13 journaled in the fixed bearing 13-, and to oneside of said pulley B there is a suitable sprocket-wheel B around whichpasses the sprocket-chain D, which at its opposite end passes-around asuitable sprocket-wheel D fast on the shaft D, (see Figs. 1 and 2,) andto the rear of the bevelgear D also fast on said shaft D. This bevelgearmeshes with the bevel-gearE on the shaft E, which is provided withsuitable bearings held on the vertical rods F F by suitable 6oset-screws. On the opposite end of the shaft E is firmly secured thesprocket-wheel G, over which passes a sprocket chain G, which alsopasses over the sprocket-wheel G fast on the shaft G supported at itsopposite ends by suitable bearings Gr on the lower end of the verticalrods F F, (see Figs. 2 and 4,) and said shaft G carries a fan G havingfour leaves G and said fan G is adapted to be turned in a directioninwardly toward the side of the upper electrode M by the moveinentcommunicated by the sprocket-chain G, turned by the shaft E. Aroundanother sprocket-wheel D fast on the shaft D, is a sprocket-chain H,which passes downward and around the sprocket-wheel H, fast on the shaftH which carries the fan G having blades similar to the blades G of thefan G and supported in suitablebearings G on the lower ends of the rodsF and F On said shaft D there is another sprocket-wheel D with which thesprocket chain J works and which at its opposite end passes around asuitable sprocket-wheel J fast on the shaft J supported in the bearingsJ 3 and J secured on the sprocket-chain K which passes downwardly andaround another sprocket-wheel K which is secured to a shaft K andcarries a fan G having blades similar to the blades G of the fan G andat its opposite ends in the bearings G".

As above described, the power communi- IOO cated through the chain Dturns the fans G G and G inwardly toward the sides of the upperelectrode, as indicated by the arrows,

and the other fan GS is also turned inwardly toward the other side ofthe electrode M by the power communicated through the sprocket-chain D,as will appear from the following description. The shaft J 2 is drivenby the sprocket-chain J in the direction indicated by the arrow, andthere is secured fast thereon the bevelgear J which meshes with thebevel-gear J fast on the shaft J supported at one end in the bearing Jon the upper end of the rod F and near its opposite end in the bearing Jnear the upper end of the rod F and on the extreme end of the shaft Jthere is secured fast the gear-wheel J which meshes with the gear-wheelJ fast on the stud J supported in the bearingJ, secured on the rod Fbelow the bearing J On said stud there is secured fast thesprocket-wheel J around which is located the sprocketchain J whichpasses downwardly around the sprocket-wheel J fast on the shaft Jsupported in the bearings G and having blades similar to the blades G ofthe fan The shaft J revolving, as indicated by the arrow, outwardly,causes the shaft J to revolve outwardly, as indicated by the arrow, andwith it the gear-wheel J, and the gearwheel J acting on the wheel Jturns the same inwardly, as indicated by the arrow, and this inwardmovement causes the inner side of the sprocket-chain J to turn the shaftJ with the fan G inwardly toward the side of the electrode M.- Therotatable fans form regulating and distributing mechanisms. They areinterposed between the feed proper and the anode and serve to regulateand distribute the supply of material to the are.

From the above it is clear that by the m echanism provided the powerthat is transmitted from the sprocket-chain D turns all the fans G, G Gand G inwardly toward the sides of the upper electrode M, The bearingsG", provided for the shafts G K, H and J, by which each fan is carried,are secured in any suitable manner on the lower ends of the rods F F F FOn the outside of all the fans there is a frame T, consisting of fourplates T, with an inwardly-projectiug shelf T and the object of saidframe is to cause the carbon and lime when agitated by the revolvingfans to be turned inwardly toward the sides of the electrode and notthrown away from the electrodes by the revolving fans. The plates T areeach supported by arms U, which at their upper ends U are secured to therods F, F and F and at their lower ends are riveted at U" to suitableflanges T on each plate T, and by means of said supports said plates Tof the frame T are supported in their proper positions. The rods F, F,F, and F are supported and suspended from lugs M formed on the plates M,which are located around the center of the upper electrode M, and bymeans of the bolt and nut M said plates are firmly secured in placearound said electrode. By means of suitable set-screws 3f the rods F, F,F and F can be vertically adjusted in their supporting-lugs M. Inasmuchas the plates M are firmly secured around the electrode M it is obviousthat whatever the position of the electrode be the rods F, F, F, and Fwill move with said electrode and carry the operating mechanism of thefans, the fans, and the frame T. Eyes M secured to the top of theelectrode M, on the opposite sides, are connect-ed to chains M", whichpass upwardly and over the pulleys M secured to the under side of thecrossbeam 0 supported by the side beams C O, and the other ends of saidchains are connected to a ring M supporting the weight M. The electrodeis counterbalanced by the weights M as it changes its vertical position.Secured to the top of the upper electrode by a screw N is a rack-bar N,which passes upwardly through the floor C, and with said rack-bar Nthere is adapted to mesh the pinion N on the shaft N supported by thebearings N and N on the cross-beam C Fast on the opposite end of theshaft N is a wormwheel N, which works with the worm N fast on the upperen d of the shaft X which passes down through the supports N", securedto the side beam 0, and at its lower end said shaft N is provided with ahandle N by which it may be operated manually when desired. Fast on theshaft N and below the worm l\- is a ratchet N with which works the pawlN having the usual spring to cause the engagement of the pawl andratchet, and said pawl is carried by the rod N pivotal] y mounted on thepin N firmly fixed in its position in the slot X on the arm N securedfast to the shaft N". In the upper end of the slot N there is firmlysecured a pin 0, to which is pivotally secured the shaft 0, which at itsopposite end is pivotally secured to a pin 0 fixed in the slot 0 of thearm 0, fast on the shaft 0", and to the rear side of said arm 0 there iskeyed fast the wornrwheel O, with which works the worm D, which islocated fast on the shaft A. Secured fast to the shaft N is agear-segment Q, which is a part of the arm N and which is adapted tomesh with the gear-wheel Q on the stud Q which may be supported by anysuitable bracket secured on the beam 0. On said shaft Q is asprocket-wheel Q, over which passes the sprocket-chain Q, which at islower end passes around the sprocket Q7, fast on the shaft Q mounted ina suitable bearing Q secured to the beam C. To one side of thesprocket-wheel Q is a gear-wheel Qt, fast on the shaft Q and adapted tomesh with the rack-bar Q", which is supported and moves in the bearing Qand at its inner end is connected at Q to the lower plate R of the lowerelectrode R, carried by suitable wheels R which are adapted to move onthe rails R, supported by a truck consisting of the wheels R" on theaxle R, and a suitable handle It is connected to said truck, wherebysaid lower electrode B may be moved out from below the upper electrode Malong the rails R The lower electrode R is composed of any suitablematerial, as carbon, (see Fig. 4,) and is located on the bottom plate Rand within a telescope consisting of the telescoping sections S, S, Sand S, which are adapted to work and telescope within one another, andthe lower section S is secured to the plate R by clips S and to theupper section S there is secured at S a plate S with an opening S",which is somewhat larger than the top and bottom electrodes, sothat theupper electrode and the bottom electrode can be brought into contact tostart the are.

Resting on the top plate S is the frame T, the front side of which isshown in dotted lines, Figs. 1 and 2, in order to prevent obscuring theother parts of the apparatus. The lower electrode R is reciprocated inthe following manner: The worm D on the shaft A meshes with theworm-wheel O and turnssaid wheel slowly toward the right, as indicatedby the arrow, and in said movement the arm fast on the shaft 0 moves inthe same direction from its normal or starting position, (shown in fulllines, Fig. 1,) and said arm pushes the rod 0 toward the right,whichmovement causes the upper end of the arm N to move to the right,and thismovement of the upper end of the arm N causes the segment-gear Q, ofwhich it is an integral part, to move toward the left, and thisleft-hand movement of the segmen t-gear Q, meshing with the gearwheel Q,causes the gear-wheel Q to act through the intermediate connections onthe rack-bar Q" and moves said rack-bar toward the right, and therack-bar in said movement pulls said bottom electrode R in the same direction. Now when the arm O has completed a partial revolution and is ina position at right angles to the position shown in full lines, Fig. 1,it begins its movement toward the left, and in said movement the rod 0is pulled toward the left, and with it the upper end of the arm N andthis left-hand movement of the arm N causes the segment-gear Q to movetoward the right, and this righthand movement of said gear, acting onthe gear-wheel Q through the intermediate connections, causes thegear-wheel Q to move the rack-bar Q inwardly toward the left, and withit the lower electrode R, and as the arm 0 makes a partial revolutiontoward the left and pulls with it the rod 0 and arm N the segmentgear Q,through the intermediate connections, causes the gear-wheel Q to movethe rack-bar Q and the lower electrode R to its normal position towardthe left. Now as the arm O' begins again a partial turn it pushes therod 0 and arm N toward the right, and this movement of the arm N causesthe segment-gear Q to move to the left, and this left-hand movement ofthe segmen t-gear Q causes the gear-wheel Qfithrough the intermediateconnections, to act on the rack-bar Q and move it toward the right, an dwith it the bottom electrode R, which by the partial movement of the arm0" has been brought to its normal position, as shown in full lines, sothat from the above it is obvious that each complete revolution of thewheel 0 and arm 0 causes the bottom elec trode R to move, first, towardthe left, and then to be returned to its normal position and continuedin its movement toward the left beyondits normal position, and, lastly,pulled to the right to its normal position under the top electrode. Asthe arm N moves toward the right, it causes the pulley N to turn theratchet N and this movement of the ratchetwheel is communicated to theshaft N, on which is mounted fast the worm N working with the worm-wheelN on the shaft N and as the arm N moves toward the left it brings thepawl into engagement with the next tooth, so that each movement of thearm N toward the right communicates movement to the shaft N through theshaft N and worm N and worn1-wheel N.

By adjusting the rod 0 in the slot 0 of the arm 0 the length of thetravel of the lower electrode R can be regulated, because the throw ofthe arm 0 will be more or less as the pin 0 is more or less removed fromthe center of the shaft 0 The same regulation of movement applies to theadjustment of the pin 0 in the slot N of the arm N Through the top plateV of the upper electrode extend opposite vertical rods W, secured inplace by suitable nuts VW, and said rods extend downwardly and areprovided on their lower ends with rollers WV, which in the operation ofthis particular design of furnace are adapted to be placed under theplate S, so that as the upper electrode in the operation of the furnacemoves upwardly said rods TV will lift the plate S and cause thetelescopic furnace-walls to rise, and thus confine within the telescopicwalls and frame T the calcium carbid Z, formed by the electric arc, andthe raw material Z being fed to supply the arc. These rods are not rigidin their upper supports, but are allowed some lateral movement, so thatwhen the operation is complete the lower ends may be knocked away frombeneath the plate S when the telescope closes, and the lower electrode Rmay be removed by means of the truck previously described. hen thefurnace is about to start, the top electrode is brought down intocontact with the bottom electrode R in order to start the arc, in whichposition the telescopic sections S, S, S and S are closed and therollers W" are placed under the edges of the plate S, and as theoperation continues and the upper electrode moves upwardly the rods WVmove said plate S" and cause the telescope to open, as shown in Fig. 1.By means of this lower telescopic electrode the calcium carbid isconfined within the chamber where it is made, as is also the rawmaterial being fed, as previously stated.

The carbon and lime are admitted in any suitable manner into the hoppersP, and from g each hopper there extends downwardly the IIO tube P, oneon each side of the upper electrode M, and through said tubes the carbonand lime pass from each hopper to the fans G G G and G", which,revolving rapidly and turning inwardly toward all four sides of theelectrode M, agitate said carbon and lime and throw it inwardly towardthe electrodes and mechanically supply or feed to the arc the necessaryamount of raw material for the arcs most economical operation, the frameT preventing the dispersion of the raw material to an undue extent.

Through the two front hoppers passes the shaft P having bearings P atits opposite ends, located on the upper floor O and that portion of theshaft within each hopper is 0011- structed with an endless screw P,which in revolving conveys the material toward the end where the tube Penters. The construction of each hopper and its mechanism is the same.Fast on the shaft P there is fixed the pulley P around which passes thedriving-belt P, also located around the pulley P fast on the shaft A,and said shaft 1? is driven by said belt P. The two rear hoppers areprovided with a shaft similar to the shaft P, which receives its powerfrom the belt P passing around the pulley P, and a similar pulley islocated on the shaft of the other two hoppers, whereby the shaft of saidhoppers is operated to feed the material down the tubes which leadtherefrom. The binding-plates V, located on the sides of the electrode,are securely held in place by the cross-bars V and suitable nuts Y andthe object thereof is to hold the electrodes firmly together.

The power communicated to the gearing is so arranged as to rotate thefans rapidly, sufficiently so to perform the function of keeping the rawmaterial fed into the furnace from the hoppers close against theelectrodes and mechanically feed the are, so that the are formed duringthe process of working is always supplied with raw material to keep onproducing the essential product, and the raw material is thusmechanically fed to the arc. The worm-gear is designed to operate thesegment-gear at a rate of speed and reciprocates the lower electrode ata speed proportionate to the formation of the essential product. Inother words, the reciprocation is very slow, the reduction of the speedtakes place through the various gears, and the speed is calculated tokeep proportional to the more or less rapid formation of the essentialproduct formed by the arc. The fans are calculated to move at a rate ofspeed sufficient to keep the are thoroughly fed, and should m orematerial be fed in than is required to keep the are supplied, the framesurrounding the fans being only of such dimensions as is requisite tohold sufficient raw material for carrying on the operation, the excessof raw material falls to the floor and is not burned out or otherwiseinjuriously affected by being in close proximity with the heat incidentupon or radiated from the arc. Thus the frame surrounding the upperelectrode prevents the undue dispersion of the raw material by themechanical devices employed to feed the are, so that the arc is at alltimes insured a most economical operation by supplying only such aquantity of raw material as is sufficient to keep the are at all timesthoroughly fed, and so should an excess of material be fed from thehoppers this excess of material falls over the sides of said framebefore said excess of raw material can be injuriously affected by theheat incident upon the formation of the are and can again be utilizedfor the fabrication of the ultimate product. In other words, the frameprevents an excessive dispersion of the raw material and helps to keepthe are supplied with sufficient raw material and no more than is foundto be economical.

The reci rocatin movement of the lower electrode is automaticallyregulated to permit of the raw material being fed onto the ultimateproduct formed and to cause said raw material to be brought directlywithin the path of the electric arc.

The automatic device for feeding the raw material is preferable to thatof any operation by hand for performing the same function, as mechanicaldevices permit of feeding regularly and steadily and also feeding theproper amount of raw material to insure the most economical operation.hen the furnace is in operation and the product is being formed, theelectrodes are maintained in such relative positions as to maintain thedesired electrical resistance. Now taking the fabrication of calciumcarbid as an illustration of one of the products produced in my electricfurnace we find that the raw material entering into its composition ispractically a non-conductor of electricity, and as the electric arc isused for its product-ion it is plain that should an excess of rawmaterial be fed to the are or between the electrodes an excessiveelectrical resistance will result, and only such an amount should bethus fed to the are as the arc is capable of acting upon in a determinedperiod of time, and thus a regulated quantity of raw material can be fedto the are constantly. The fans by their rotation agitate and feed tothe are a constant supply of raw material at regulated quantitiessupplied from the hoppers. \Vithout mechanical devices for feeding it isfound to be practically impossible in practical operation on acommercial scale to keep the are constantly supplied with the rawmaterial, as the are at one moment may cause a space between theelectrodes and the raw material now on one side and a moment after onthe other side, whereas by the devices shown all sides of the electrodeare kept in practically constant contact with the raw material, and thusat all times and on all sides the arc is supplied with the necessaryamount of raw material, and the process of thus making carbid isrendered more economical in having the are always at work producing theessential IIC product. The fans are so located with reference to the areas to insure the are being continually supplied with the necessary rawmaterial.

Apart from mechanically feeding the raw material intowhat may be termedthe path of the arc it is also desirable to continually surround bothelectrodes at the point where the arc is located with the raw material,so that from all sides of the electrodes the raw material can bemechanically supplied to the arc. As the lower electrode reciprocatesunder the top electrode the calcium carbid formed by the are on that endof the electrode which is moving from underthe top electrode receivesthe raw material directly on top and brings said raw material directlywithin the influence of the are and under the top electrode as itreturns to its normal position, and the same operation takes place whenthe bottom electrode reciprocates in the opposite direction from itsnormal position under the top electrode, so that in the right and leftreciprocations of the electrode R raw material is dropped directly onthe right and left hand ends of the bottom electrode and then broughtdirectly within the influence of the are by the return movement of saidelectrode.

In the manufacture of calcium carbid by my electric furnace the electricarc is employed. It is known that the very high temperature of the arerapidly disintegrates most substances brought within its influence.Consequently in commercial practice, it is found essential to keep thewalls or sides composing the electric furnace out of contact with orremoved from the are, so that they may not be injuriously affected bythe heat consequent upon the operation. It is found that the rawmaterial entering into the fabrication of calcium carbid is an excellentnonconductor of both heat and electricity and that the interposition ofthe raw material between the electrodes and the Walls of the furnaceeffectually protects the latter from the heat incident upon thefabrication of calcium carbid. The heat is naturally greater where thearc is located. Consequently a necessary quantity of this raw materialis desirably interposed between the furnace-walls and the electrodes andaround the location of the are. As described, the plate S moves withrelation to the frame T from the points S to S and at all times thereisinterposed at the seat of the are, which is relatively on a plane nearto the top plate S, an amount of raw material between the electrode Mand the sides of the frame 'I which is greater than that requiredbetween the electrodes and the newly-formed carbid and the sides of thetelescopic furnace. As the operation is carried on and the newlyformedcarbid Z grows higher, with it the telescopic walls of the furnace riseand permit the carbid Z and the original electrode to be surrounded bythe raw material Z between the carbid Z and the walls of the telescopicfurnace, whereby the walls of the telescopic f u rnace proper areeffectually protected with a minimum amount of raw material, which, asabove stated, forms an excellent non-conductor of both heat andelectricity; but said material becomes a good conductor of electricitywhen converted into calcium carbid.

Instead of raising the upper electrode the lower electrode may belowered as the calcium carbid is formed on the top thereof, and

' the upper electrode may be reciprocated over the lower electrode,thereby insuring the same result, as previously described.

The power required to carry on the different mechanical movements asdescribed may be derived from the same or independent sources, it beingonly necessary, as hereinbefore set forth, to have said mechanicalmovements travel at a designated speed with relation to each other andto the essential product formed.

1 do not limit myself to the arrangement and construction shown, as thesame may be Varied without departing from the spirit of my invention.

Having thus ascertained the nature of my invention and set forth aconstruction embodying the same, what I claim as new, and desire tosecure by Letters Patent of the United States, is-- 1. In anelectric-arc furnace, two opposite electrodes, a feed mechanism, aregulator opcrating independently of said feed mechanism and locatedadjacent to the anode for receiving the material to be treated from saidfeed mechanism and for supplying the same to the arc, and means foroperating said regu lator.

2. In an electric-arc furnace, two opposite electrodes, a mechanism formoving one of said electrodes relatively to the other, a feed mechanism,a regulator operating independently of said feed mechanism and locatedadj acent to the anode for receiving the material to be treated fromsaid feed mechanism and for supplying the same to the arc, and means foroperating said regulator.

3. In an electric-arc furnace, two opposite electrodes, mechanism formoving one of said electrodes relative to the other, a feed mechanism,and a regulator independent of said feed mechanism and carried by saidmovable electrode intermediate of said feed mechanism and the anode forreceiving the material to be treated from said feed mechanism andsupplying the same to the arc.

4. In an electric-arc furnace, two opposite electrodes, a feedmechanism, a rotatable fan operating independently of said feedmechanism and located. adjacent to the anode for receiving'the materialto be treated from said feed mechanism and to regulate the supply of thesame to the arc, and means for rotating said fan.

5. In an electric-arc furnace, two opposite electrodes, mechanism formoving one of said electrodes, a feed mechanism, and a rotatable fanlocated intermediate of said feed mechanism and the anode fordistributing and regulating the supply of material to the arc.

(S. In an electric-arc furnace, two opposite electrodes, mechanism formoving one of said electrodes, a feed mechanism, and a rotatable fancarried by said movable electrode intermediate of said feed mechanismand the anode for distributing and regulating the supply of material tothe are.

T. In an electric-arc furnace, two opposite electrodes, mechanism formoving one of said electrodes horizontally, a mechanism for moving theother of said electrodes vertically, a feed mechanism, and a rotatablefan carried by said vertically-movable electrode intermediate of saidfeed mechanism and the anode for distributing and regulating the supplyof material to the are.

S. In an electric-arc furnace, two opposite electrodes, mechanism formoving one of said electrodes, a feed mechanism, a plurality of fanscarried by said movable electrode intermediate of said feed mechanismand the anode for regulating and distributing the supply of material tothe are, and means for rotating said fans.

9. In an electric-arc furnace, two opposite electrodes, a feedmechanism, a regulating mechanism operating independently of said feedmechanism and located adjacent to the anode for receiving the materialto be treated from said feed mechanism and for supplying the same to theare, means for operating said regulating mechanism, and a wallsurrounding said regulating mechanism.

10. In an electric-arc furnace, two opposite electrodes, mechanism formoving one of said electrodes, a feed mechanism, a distributing andregulating mechanism located intermediate of said feed mechanism and theanode, and a telescopic wall surrounding said distributing andregulating mechanism.

11. In an electric-arc furnace, two opposite electrodes, a mechanism formoving one of said electrodes, a feed mechanism, a rotatable fan locatedintermediate of said feed in echanism and the anode for distributing andregulating the supply of material to the are, and a telescopic wallsurrounding said fan.

12. In an electric-are furnace, two opposite electrodes, mechanism formoving one of said electrodes, a feed mechanism, a rotatable fan carriedby said movable electrode intermediate of said feed mechanism and theanode for distributing and regulating the supply of material to the are,and a telescopic wall surrounding said fan.

13. In an electric furnace, two opposite electrodes, mechanism formoving one of said electrodes relative to the other, a feed mechanism, aregulator operating independently of said feed mechanism and locatedadjacent to the anode for receiving the material to be treated from saidfeed mechanism and for supplying the same to the arc, and means formoving said regulator simultaneously with said movable electrode.

ll. In an electric-arc furnace, two opposite electrodes, mechanism formoving one of said electrodes, a feed mechanism, a distributing andregulating mechanism movable simultaneously with said movable electrodeand located intermediate of said feed mechanism and the anode, and atelescopic wall surrounding said distributing and regulating mechanism.

15. In an electric-arc furnace, two opposite electrodes, mechanism formoving one of said electrodes, a feed mechanism, a rotatable fan movablesimultaneously with said movable electrode and located intermediate ofsaid feed mechanism and the anode for distributing and regulating thesupply of material to the are.

16. In an electric-arc furnace, two opposite electrodes, a mechanism formoving one of said electrodes, a feed mechanism, a rotatable fan movablesimultaneously with said movable electrode and located intermediate ofsaid feed mechanism and the anode for distributing and regulating thesupply of material to the are, and a telescopic wall surrounding saidfan.

17. In an electric-arc furnace, two opposite electrodes, mechanism forseparating said electrodes, and a wall consisting of telescopic sectionsaround the lower electrode and adapted to extend and inclose the lowerelectrode and newly-formed carbid as the electrodes separate.

18. In an electric-arc furnace, two opposite electrodes, mechanism forseparating said electrodes, mechanism for feeding the material to betreated to the path of the electric arc, a wall consisting of telescopicsections around the lower electrode and adapted to extend and inclosethe lower electrode and newly-formed carbid as the electrodes separate,and a frame located around said feeding mechanism for keeping the rawmaterial in contact with said feeding mechanism to keep the areconstantly supplied and adapted with the telescopic f urnace-wall toinclose the lower end of the upper electrode and the newly-formed carbidon the top of the lower electrode as the electrodes separate.

19. In an electric-arc furnace, two opposite electrodes, mechanism forseparating said electrodes, mechanism for feeding the material to betreated to the path of the electric are, a wall consisting of telescopicsections around the lower electrode and adapted to extend and inclosethe lower electrode and newly-formed carbid as the electrodes separate,and a frame located around said feeding mechanism for keeping the rawmaterial in contact with said feeding mechanism to keep the areconstantly supplied and for removing the excess of raw material fromproximity to the are whereby said excess is not injnriously affected bythe heat of the are and adapted with the telescopic furnace-wall and forsupplying the same to the are, and means for simultaneously operatingall said mechanisms.

In testimony whereof I have signed my name to this specification, in thepresence of two subscribing Witnesses, this 1st day of June, A. D. 1897.

JAMES A. DEUTIIER.

Witnesses:

O. A. STEWART, A. L. MESSER.

